Philips B7X14A - The radio works unreliably; 1 The radio crackles and;or is intermittent

C The radio works unreliably
1 The radio crackles and/or is intermittent a. Follow the directions mentioned in A-1
b. Check if the antenna-ground connectors
making good contact
c. Check if the symptom can be resolved by
replacing tubes in sequence
Block diagram
B2 Mixer B3 IF amplifier B4 detector B6-B7 Audio
LW MW SW LW MW SW Amplifier
B1 FM unit B2 IF amplifier B3 IF amplifier B4 IF amplifier B5 detector B6-B8 Audio
FM FM FM FM Amplifier
B9 Power B10 Tuning
Supply indicator
Special thanks are due to Jef Collin for this translation